The design of a simple circuit which can divide one voltage V by another V is described. The circuit, employs two operational amplifiers, a comparator and a programmable unijunction transistor (PUT). The output, V is in the form V= K(V/V), where K is a constant which can be programmed through the PUT.
A division circuit can be conveniently employed to get a linear output in applications involving inverse proportionality functions. For example, in resistance measurement with a constant voltage, as found in common multi-meters, the current varies inversely as the resistance, resulting in a non-linear scale. To linearize such a function, using the sophisticated division circuits employed in analog computation techniques, is quite expensive. Besides, these circuits are usually complex. This note describes the design of a simple division circuit based on a novel technique. [ABSTRACT FROM AUTHOR]